Improved folding seat



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DAVID H. NATION, OF ST1. LOUIS, MISSOURI.

teem Patent No. 90,183, dated Ma/y 1s, 1869.

IMPROVED FOLDING- SEAT.

The Schedule referred to in these Letters Patent and making part Of the lama.

`of same, hereinafter described.

Similar letters indicate like parts. The seat A, fig. 1, is attached to arms, represented by the dotted lines a a', inthe ordinary way. l These arms are cast with elliptical projections b b', b only vbeing seen in fig. 3, having an opening in the centre, as seen, the major diameter of the ellipse making an angle of about forty-five degrees With the plane of the arm.

The standards d al of the desk are cast with elliptical sockets e e', iig. 1, e', fig. 2, having bevelled should ers o o' on either side of the inner circumference, as shown in iig. 2, the minor diameter of the ellipse being at right angles to the plane of the standards.\

The projections b b having been inserted in the sockets e cf, a bolt is passed through both, making a trunnion for the seat to work on.

When the seat is in use, the sides of b b rest against the sides of e e', and also on the shoulders o o', which gives two bearings, making the seat much stronger,

since it removes all weight from the trunnion, which, in these seats, is in practice found to ,be generally the weakest part. Of course when the seat is thrown back, the opposite sides of b b impinge against the opposite sides of e e', preventing the seat from going too far back.

If desired, rubber or other elastic substance may be inserted in b b', at the respective points of contact, or even in e e', but I think it will be better, if rubber is used, to have it on b b', since it will be easier to cast the necessary cavities for its reception on these than.

in the sockets.

The shoulders o o are not essential to the Well working of the seat, and are used merely to prevent any possibility there might be of the parts binding. I therefore do not limit myself to a seat containing such device.

I do not, of course, claim any originality inthe seat itself, or the idea of having it fold as described,` since this is common and well known; but

lVhat I do claim as my invention, and desire to secure by Letters Patent, is

The method of uniting a folding seat to its standards by elliptical projections b b' and sockets e e', with shoulders o o and bolts passing through them, in the manner shown and speciied.

DAVID H. NATION.

Witnesses:

SAML S. BOYD, LEWIS MYER. y 

